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xo-reflect: automatically reflecct function pointers

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This commit is contained in:
Roland Conybeare 2024-06-14 10:56:35 -04:00
commit ef191b136e
5 changed files with 209 additions and 101 deletions
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84
include/xo/reflect/Reflect.hpp
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@ -11,6 +11,7 @@
#include "pointer/PointerTdx.hpp"
#include "vector/VectorTdx.hpp"
#include "struct/StructTdx.hpp"
#include "function/FunctionTdx.hpp"
#include "xo/refcnt/Refcounted.hpp"
#include <vector>
#include <array>
@ -21,44 +22,69 @@ namespace xo {
template<typename T>
class EstablishTdx {
public:
/** Create auxiliary reflection info for type @tparam T,
* once full definition is available.
*
* This includes:
* - metatype
* - component structure (types for navigable component objects)
*
**/
static std::unique_ptr<TypeDescrExtra> make() { return AtomicTdx::make(); }
}; /*EstablishTdx*/
};
// ----- xo::ref::rp<Object> -----
/* definition provide after decl for Reflect {} below */
template<typename Object>
class EstablishTdx<xo::ref::rp<Object>> {
public:
/* definition provide after decl for Reflect {} below */
static std::unique_ptr<TypeDescrExtra> make();
}; /*EstablishTdx*/
};
// ----- std::array<Element, N> -----
/* definition provide after decl for Reflect {} below */
template<typename Element, std::size_t N>
class EstablishTdx<std::array<Element, N>> {
public:
/* definition provide after decl for Reflect {} below */
static std::unique_ptr<TypeDescrExtra> make();
}; /*EstablishTdx*/
};
// ----- std::vector<Element> -----
/* definition provide after decl for Reflect {} below */
template<typename Element>
class EstablishTdx<std::vector<Element>> {
public:
/* definition provide after decl for Reflect {} below */
static std::unique_ptr<TypeDescrExtra> make();
}; /*EstablishTdx*/
};
// ----- std::pair<Lhs, Rhs> -----
/* definition provide after decl for Reflect {} below */
template<typename Lhs, typename Rhs>
class EstablishTdx<std::pair<Lhs, Rhs>> {
public:
/* definition provide after decl for Reflect {} below */
static std::unique_ptr<TypeDescrExtra> make();
}; /*EstablishTdx*/
};
// ----- Retval (*)(A1 .. An) -----
template<typename Retval, typename... Args>
class EstablishTdx<Retval(*)(Args...)> {
public:
/* definition provided after decl for Reflect {} below */
static std::unique_ptr<TypeDescrExtra> make();
};
// ----- Retval (*)() -----
template <typename Retval>
class EstablishTdx<Retval(*)()> {
/* definition provided after decl for Reflect {} below */
static std::unique_ptr<TypeDescrExtra> make();
};
// ----- MakeTagged -----
@ -229,6 +255,46 @@ namespace xo {
return StructTdx::pair<Lhs, Rhs>();
} /*make*/
// ----- Retval (*) (A1 .. An) -----
namespace detail {
/** @class AssembleArgv
* @brief create vector of complete TypeDescr objects comprising all template arguments
*
* Use:
* std::vector<TypeDescr> v;
* AssembleArgv<Arg1, .., Argn>::append_argv(&v);
* // do something with v
**/
template <typename... Args>
struct AssembleArgv;
template <>
struct AssembleArgv<> {
static void append_argv(std::vector<TypeDescr> * p_v) {}
};
template <typename Arg, typename... Rest>
struct AssembleArgv<Arg, Rest...> {
static void append_argv(std::vector<TypeDescr> * p_v) {
p_v->push_back(Reflect::require<Arg>());
AssembleArgv<Rest...>::append_argv(p_v);
}
};
} /*detail*/
/* declared above before
* class Reflect { ... }
*/
template <typename Retval, typename... Args>
std::unique_ptr<TypeDescrExtra>
EstablishTdx<Retval (*)(Args...)>::make() {
std::vector<TypeDescr> argv;
detail::AssembleArgv<Args...>::append_argv(&argv);
return FunctionTdx::make_function(Reflect::require<Retval>(), std::move(argv));
}
} /*namespace reflect*/
} /*namespace xo*/